The PC version of Grand Theft Auto IV adds Independence FM to the station line-up, which plays digital music files of the user's choice. Music files or shortcuts to music files placed within the GTA IV User Music folder are played in varying modes as selected by the user. Sequential mode plays the files in order, Shuffle mode randomly selects files, and Radio mode randomly plays songs with DJ commentary and advertisements. Supported file types are.wma,.mp3 and.m4a. QuickTime or iTunes needs to be installed for M4A support. In order for music to be played in Independence FM, the player must tell the game to scan the folder.[11]​